LNK606PG

LNK603-606/613-616 LinkSwitch-II Family Energy-Efficient, Accurate CV/CC Switcher for Adapters and Chargers Product Highlights Dramatically Simplifies CV/CC Converters • Eliminates optocoupler and all secondary CV/CC control circuitry • Eliminates all control loop compensation circuitry Advanced Performance Features Compensates for transformer inductance tolerances Compensates for input line voltage variations Compensates for cable voltage drop (LNK61X series) Compensates for external component temperature variations Very tight IC parameter tolerances using proprietary trimming technology • Frequency jittering greatly reduces EMI filter cost • Even tighter output tolerances achievable with external resistor selection/trimming • Programmable switching frequency up to 85 kHz to reduce transformer size • • • • • Wide Range High-Voltage DC Input D LinkSwitch-II FB BP/M S PI-4960-012315 (a) Typical Application Schematic ±5% VO Advanced Protection/Safety Features • Auto-restart protection reduces power delivered by >95% for output short-circuit and control loop faults (open and shorted components) • Hysteretic thermal shutdown – automatic recovery reduces power ±10% supply returns from the field • Meets high-voltage creepage requirements between DRAIN and all other pins both on the PCB and at the package EcoSmart™– Energy Efficient • Easily meets all global energy efficiency regulations • No-load consumption below 30 mW at 230 VAC with optional external bias winding • ON/OFF control provides constant efficiency down to very light loads – ideal for CEC and ENERGY STAR 2.0 regulations • No current sense resistors – maximizes efficiency Green Package • Halogen free and RoHS compliant package Applications • Chargers for cell/cordless phones, PDAs, MP3/portable audio devices, adapters, LED drivers, etc. Description The LinkSwitch™-II dramatically simplifies low power CV/CC charger designs by eliminating an optocoupler and secondary control circuitry. The device introduces a revolutionary control technique to provide very tight output voltage and current regulation, compensating for transformer and internal parameter tolerances along with input voltage variations. The device incorporates a 700 V power MOSFET, a novel ON/OFF control state machine, a high-voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry onto a monolithic IC. IO PI-4906-012315 (b) Output Characteristic Figure 1. Typical Application/Performance – Not a Simplified Circuit (a) and Output Characteristic Envelope (b). (see Application Section for more information). Output Power Table 85-265 VAC Product3 Adapter Open Frame2 LNK603/613PG/DG 2.5 W 3.3 W LNK604/614PG/DG 3.5 W 4.1 W 1 LNK605/615PG/DG 4.5 W 5.1 W LNK606/616PG/GG/DG 5.5 W 6.1 W Table 1. Output Power Table. Notes: 1. Minimum continuous power in a typical non-ventilated enclosed adapter measured at +50 °C ambient, device, TJ